# Research Papers
# Blockchain Technology for Smartphones and Constrained IoT Devices: A Future Perspective and Implementation
Authors: Konstantin Zhidanov, Sergey Bezzateev, Alexandra Afanasyeva, Mikhail Sayfullin, Sergey Vanurin, Yulia Bardinova, Aleksandr Ometov
The blockchain technology is currently penetrating different sides of modern ICT community. Most of the devices involved in blockchain-related processes are specially designed targeting only the mining aspect. At the same time, the use of wearable and mobile devices may also become a part of blockchain operation, especially during the charging time. The paper considers the possibility of using a large number of constrained devices supporting the operation of the blockchain. The utilization of such devices is expected to improve the efficiency of the system and also to attract a more substantial number of users. Authors propose a novel consensus algorithm based on a combination of Proof-of-Work (PoW), Proof-of-Activity (PoA), and Proof-of-Stake (PoS). The paper first overviews the existing strategies and further describes the developed cryptographic primitives used to build a blockchain involving mobile devices. A brief numerical evaluation of the designed system is also provided in the paper.